On the main invariant of an element over a local field.
Popescu, N., Zaharescu, A. (1997)
Portugaliae Mathematica
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Popescu, N., Zaharescu, A. (1997)
Portugaliae Mathematica
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Tomáš Kepka, Petr Němec (2013)
Acta Universitatis Carolinae. Mathematica et Physica
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The paper continues the investigation of quasitrivial semimodules and related problems. In particular, strong endomorphisms of semilattices are studied.
O. D. Artemovych (1999)
Commentationes Mathematicae Universitatis Carolinae
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We characterize left Noetherian rings which have only trivial derivations.
Azam Babai, Behrooz Khosravi (2012)
Czechoslovak Mathematical Journal
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Let be a finite group. The prime graph of is a graph whose vertex set is the set of prime divisors of and two distinct primes and are joined by an edge, whenever contains an element of order . The prime graph of is denoted by . It is proved that some finite groups are uniquely determined by their prime graph. In this paper, we show that if is a finite group such that , where , then has a unique nonabelian composition factor isomorphic to or .
Geroldinger, A. (1992)
Acta Mathematica Universitatis Comenianae. New Series
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David Gove (1993)
Acta Arithmetica
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